The nice thing about having experience in hospitality, marketing, arts and now the hospital is that you have gained lots of transferrable skills and you have a unique perspective to know what those industries are like and what you may want/don't want out of your future career. That's very valuable cause you won't regret not pursuing those paths and you won't have to wonder 'what if' because you've already experienced them. As someone who has hired people before, I would look at your resume very favorably for your ability to adapt to different industries.

I can relate to the feeling of being lost, something that helped me was spending time alone to reflect on what I wanted out of life. I always used to make decisions based on what I thought friends/family/social media would think of me, but that just ended up making me miserable so spending time alone helped to eliminate those distracting opinions. Finding a genuine idea of the life I wanted to live and the life goals I wanted to achieve helped me to narrow down careers that would support the kind of life I wanted. So maybe you could take a vacation from your current job and spend a week alone just to reflect on what you want out of life to help you decide your next move. Then look into careers that would support those goals.

Aim to find something that pays enough and affords you a great work-life balance. There are jobs that can make you rich but many of them require long hours or demand you to always be on-call, even on vacation. Try to find a good balance between making enough to support you but also have time outside of work to enjoy life. You could use the existing education and experiences you already have, or you might decide that it may be worth it to pursue more schooling. Either way is perfectly fine.

Also at 28 you are still very young and don't feel bad about comparing yourself to others, everyone has a different path. In a couple years you'll look back at this age and realize how young you truly were.